Compressive sensing-based multispectral video imager with double channels and imaging method

Abstract

A compressive sensing-based multispectral video imager comprises a beamsplitter, a first light channel, a second light channel, and an image reconstruction processor; the beamsplitter is configured to divide the beam of an underlying image into a first light beam and a second light beam; the first light beam enters the first light channel, processed and sampled in the first light channel, to obtain a first mixing spectral image which is transferred to the image reconstruction processor; the second light beam enters the second light channel, processed and sampled in the second light channel, to obtain a second mixing spectral image which is transferred to the image reconstruction processor; the image reconstruction processor is configured to reconstruct the underlying spectral image based on the first mixing spectral image and the second mixing spectral image by using non-linear optimization method.

Description

THE FIELD OF THE INVENTION[0001]This invention relates to image processing in general, in particularly, to the collection of multispectral images, which is mainly applied to the capture and reconstruction of multispectral video and image information.BACKGROUND AND RELEVANT ART[0002]Early to 1960s when man-made satellites moved around the earth and captured images of the earth, an imaging technique became a useful tool to research the earth. In traditional imaging methods, people know that gray levels of grayscale images represent the difference of optics characteristics, which can be used to distinguish different materials. Based on the fact, the imaging technique is improved increasingly. Choosing filters having different colors to filter the image is good to the research about the fields of special agricultural crops, atmosphere, ocean and soil. This kind of imaging with discrete several colors (or several bands) is the so-called multispectral imaging, and a sequence of successive...

AI Technical Summary

Benefits of technology

[0042]First, the present invention aims at the disadvantage of low imaging efficiency of traditional multispectral video imagers to propose an imaging method based on compressive sensing. The method employs double channel observation technology, and can perform fully sampling of spectral images. Every exposure can image multiple bands with high temporal resolution and high signal to noise ratio.

[0043]Second, the present invention aims at the disadvantage of vibration of traditional multispectral video imager including tunable mechanism and poor imaging quality, to propose a multispectral video imager containi

Problems solved by technology

Such procedure of sampling and compression increases the system complexity, and under the requirement of high sampling rate, it is a difficult problem to implement A/D converter.

The traditional multispectral video imagers have many disadvantages due to restrictions of their imaging concepts.

Traditional multispectral video imagers employ the structure of tunable mechanism, which brings vibration of the imagers, and results in low im

Images